We used beach water taken from Sandy Hook , canal water from the Delaware River , and pond water from the Metuchen pond.
Here are two images of Sandy Hook beach. The effect of population density on beach water is not as important as it would be in a pond because the ocean is such a large body of water that is already crashing and moving because of waves. The effect of a person moving the water around is not as important as someone doing the same thing in a pond where this movement isn’t a usual thing. This sample was also taken from the coast, where the waves are breaking, moving the water a lot. The water was relatively warm. It was after the summer so the water warmed up all summer. As the temperature of water increases, the concentration of the dissolved oxygen decreases. This leads to seasonal fluctuation in dissolved oxygen concentration.
The Delaware River ’s surroundings change slightly depending on which part of the river the samples were taken from. However, a lot of the river is surrounded by the type of environment shown in the picture. Right along the river there are trees so there is no immediate population right there, but there is surrounding population. People do go on the Delaware River . People can swim and raft in it. This would effect the area slightly, but not in huge amounts. The river was calm when the water was collected thus not negatively affecting the amount of dissolved oxygen
This image from Google Earth shows the surrounding areas of the Metuchen pond. We can see that there is some grass around the pond, some trees, and then a residential area. The area around the pond is developed, but the immediate area is rather calm. People fish in this pond, but moving water is nothing to worry about in this area. However, any human effect on this area could be large because it isn’t a large body of water. I would assume the temperature was warm this time of year. This means the concentration of dissolved oxygen was lower than it would be if the water was colder.
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